盾构切刀有限元数值模拟研究

 张禹,程军,刘慧芳

(沈阳工业大学 机械工程学院,辽宁 沈阳 110870)
摘要:盾构刀盘的设计对盾构机切削土体的切削效率起着至关重要的作用。通过对盾构刀盘切刀的仿真研究,为刀盘的地质适应性设计和盾构机掘进参数的确定提供参考。使用UG软件建立了切刀和土体的三维模型,并基于ABAQUS软件对模型进行网格划分与分析,采用修正的Drucker-Prager本构模型和带有单元删除功能的损伤模型,可以较为实际的模拟出土体的材料特性,为建立刀盘掘进的数值模拟提供土体和材料的数值仿真方法。同时结合有限元动态接触的特性,得到了切刀载荷随时间的变化规律。
关键词:盾构切刀;切削;数值模拟;本构模型
中图分类号:U455.43 文献标志码:A doi:10.3969/j.issn.1006-0316.2017.11.002
文章编号:1006-0316 (2017) 11-0006-04
Finite Element Numerical Simulation of Shield Cutter
ZHANG Yu,CHENG Jun,LIU Huifang
( School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China )
Abstract:The design of the shield cutter plays a vital role in the cutting efficiency of the cutting machine. through the simulation of shield cutter, the reference for the cutterhead geological adaptability design and shield machine to determine the parameters is provided. The cutterhead were modelled by the UG software. The model was meshed and simulated by the Abaqus software. In the numerical simulation of the cutting process, the modified Drucker-Prager constitutive model and the damage model with element deletion can be used to simulate the material properties of the soil, and to provide the soil and materials numerical simulation. At the same time, combined with the characteristics of finite element dynamic contact, the changing rule of cutter load with time is obtained.
Key words:shield cutter;cutting;numerical simulation;constitutive mode
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收稿日期:2017-04-20
基金项目:国家自然科学基金(51305277);沈阳市科技创新专项资金——重点实验室建设专项(F13-297-1-00)
作者简介:张禹(1970-),男,辽宁沈阳人,博士,教授,博士生导师,主要研究方向为机器人技术。
 

 

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